linux-kernel - [PATCH v2] checkpatch: Don't warn about returning EPOLL* defines

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Date:   Tue,  3 Dec 2019 12:19:48 -0600
From:   Ben Shelton <benjamin.h.shelton@...el.com>
To:     linux-kernel@...r.kernel.org
Cc:     Ben Shelton <benjamin.h.shelton@...el.com>,
        Andy Whitcroft <apw@...onical.com>,
        Joe Perches <joe@...ches.com>
Subject: [PATCH v2] checkpatch: Don't warn about returning EPOLL* defines

The EPOLL* defines are bit definitions, not errno values, so they should
be returned as-is, not as negative values.

Signed-off-by: Ben Shelton <benjamin.h.shelton@...el.com>
Cc: Andy Whitcroft <apw@...onical.com>
Cc: Joe Perches <joe@...ches.com>
---
 scripts/checkpatch.pl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 592911a..67ca588 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4869,7 +4869,8 @@ sub process {
 # Return of what appears to be an errno should normally be negative
 		if ($sline =~ /\breturn(?:\s*\(+\s*|\s+)(E[A-Z]+)(?:\s*\)+\s*|\s*)[;:,]/) {
 			my $name = $1;
-			if ($name ne 'EOF' && $name ne 'ERROR') {
+			if ($name ne 'EOF' && $name ne 'ERROR' &&
+			    $name !~ /EPOLL/) {
 				WARN("USE_NEGATIVE_ERRNO",
 				     "return of an errno should typically be negative (ie: return -$1)\n" . $herecurr);
 			}
-- 
2.6.4